1993 Other Jeep Models idle problem when warm?

1993 JEEP
176,000 MILES • V8 • AWD • AUTOMATIC
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SVT28103
  • MEMBER
  • 8 POSTS
i have a 93 jeep grand cherokee 5.2 v8.it idles fine when i start it when its cold,but when it gets warm the idle goes from normal being about .6 going to 1rpm then back down and up again.its a small noticable idle problem,what can i do t make it iidle normal at all times,i replaced the idle air control sensor,throttle postion sensor,did a complete tune up,and the idle problem still exists
Nov 17, 2009 at 10:26 PM
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MICKEY-D
  • ✓ASE Certified Mechanic
  • 304 POSTS
  • ASE Certified Mechanic
Try changing out the fuel filter, and check the fuel pressure regulator. You might even have a fluctuating EGR valve, due to a faulty vacuum sensor.
Dec 17, 2009 at 12:04 AM
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